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P. MYERS.

MACHINE FOR FILING SAWS. Elm-255,007. Patented Mar.14,1,882.

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7 I. MYERS. MACHINE FOR FILING SAWS.

N0. 25 5,00 7. Patented Mar. 14.1 882.

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FREDERICK MYEBS,0F NEW YORK, N. Y.

MACHINE FOR FILING SAWS.

SPECIFICATION forming part of Letters Patent No. 255,007, dated March 14;, 1882.

Application filed August 9, i881. (NomodeL) Patented in England June 30, 1881.

To all whom it may concern Be it known that I, FREDERICK MYERS, of the city of New York, in the county and State of New York, have inventednew and useful Improvements in Machinery or Apparatus for Sharpening or Filing the Teeth of Saws, of which the following is a specification. My invention relates to machinery or apparatus for sharpening or tiling the teeth of circular or other saws, and it consists in various novel features in theconstruction and arrange- I ment of the same, as hereinafter described, reference being had to the accompanyingdraw- Figure ]'is a side elevation of my improved machine. Fig. 2 is a partial front elevation sectionedon the line :c w of Fig. 1. Fig. 3 is a front elevation of the saw-holding bracket. Fig.4 is a detail ofthe saw-holding cen'ter,

study Fig. 5 is a plan view; and Fig. 6 isa.

front elevation, and Figs. 7 and 8 plans, of starting and stopping apparatus such as I pre-' fer to use.

In carrying the said invention into practice I mount in suitable front and rear bearings, a I), attached to bracket 0, on an upright stand ard or support, d, a longitudinally-reciprocating shaft, 6, whose forward end is provided with. a disk or plate, f, to which a file carrier or holder, g, is secured. The front end of the said shaft, which slides through the front bearing, a, is round, and the rear end of said' shaft is square and slides through a correspondinglyshaped hole in the rear bearing, 1), thereby preventing the rotation of the said shaft upon its axis. To the rear end of the said shaft I attach one end ofaconnecting-rod, h, whose other end is fixed to a crank-arm, i, upon a horizontal driving-shaft,j, also supported in bearings 70 upon the standard of the apparatus and provided with a driving-pulley, l, which receives motion from any suitable source or motive power. This crank is provided with a slot, m, to permit the front end of the connecting-rod to be moved nearer to or farther from the center of the driving-shaft, soas to decrease or increase the longitudinal throw of the aforesaid reciprocating shaft and the carrier and file a. To permit the said file-carrier to be turned upon its axis to give the file any desired cant or inclination laterally, I provide in a disk, 0, formed on the said carrioraud abutting against the diskf on the longitudinallyreciprocating shaft, a semicircular slot, 19, through which a screw entering the last-mentioned hole passes. By loosening this screw the filecarrier can be readily turned, the said file and file carrier or a setscrew, 73, upon which the said jaws rest or touch. By the adjustment of this screw the extent to which the file can-descend toward the saw may be readily determined. The file is provided at its forward end with a handle, u, to permit it to be readily raised from orforced down upon the saw to be sharpened or filed.

To supportthe saw to be sharpened in'fthe proper position to be acted upon by the fil e, cI. arrange upon the standard dot the apparatus-a bracket or support, '0, which carries a faceplate, 10, having a vertical slot, to, therein. Through this slot passes'the shank of ace'nter piece, y, upon which the saw is placed, the said piece being made. conical, so that saws having central openings of various diameters may be readily placed thereon. Through this conical piece passes a screw, 2, which carries at its forward end a clamp, a, adapted to press the saw firmly upon the said center piece when suitable nuts, b, are screwed up in contact with the saidclam p and against the rear surface of the face-plate. By adjusting the conical piece and the parts carried thereby up or down within the aforesaid slot in the face-plate saws of various diameters may be brought into proper of the saw near its periphery. To permit the saw to be adjusted laterally in a direction at right angles to the vertical axis of the standard of the apparatus I sometimes pivotthe aforesaid face-plate w to the bracket c at its upper and lower extremities, so that by turning the said face-plate upon its pivots the saw may be adjusted in relation to the file, so that the front or cutting surface of the teeth of the saw when sharpened will have the desired angle. I also in some cases, and as here represented, arrange the aforesaid bracket or support with a band or split collar, d, so that it may be swung around the standard of the machine for this purpose above the fixed collar 0 and be secured by a screw, 0 I also provide a graduated scale,f, by which to gage the adjustments.

\Vhen my machine is employed for sh..rpening saws that are not circular the devices for holding the saw will be somewhat modified;

but as the necessary modifications for this purpose will be obvious they need not be here described.

To effect the stopping and starting of the machine I in some cases arrange upon the driving-shaft of the same a loose pulley, Figs. 1, 2, and; 5. I prefer, however, the following arrangement-that is to say, I arrange upon the said driving-shaftj a loose pulley, I, only, whose hub is provided with lateral pins or projections g. Adjacent to the said pulley I fix upon the driving-shaft a fast collar or ring, h, which has a groove in it corresponding to a groove in the driving-shaft. grooves I arrange a sliding gib or clutch, t", which is forced into engagement with the pins o -the loose pulley by a suitable spring, (not shown,) and consequently connects the said pulley with the shaft to set the apparatus in motion when atreadle,j, is depressed and the weighted lever m is raised to release said gib. When it is desired, however, to stop the appa- Within these ratus this may be readily effected by releasing the said treadle to allow the weighted lever to fall and withdraw the gib. When this treadle is released the beveled or tapered end of the lever m drops by the weight on it, so that a projection on the aforesaid gib is caused by the rotation of the shaft to pass against the bevd eled end ofthe lever, which draws the gib back, thereby disengaging the aforesaid pulley, so that it runs loose upon the driving-shaft, andthe machine stops until the treadle is again dcpressed to lift the beveled end of the said lever and permit the spring to again act upon the gib. The treadle and the said lever will be connected for this purpose by a rod attached at one end to the pin 0 of the treadlearm p and at the other end to the pin q of the short arm of said lever.

What I claim is-- 1. In a saw-filing machine, the file-clamping jaws r, pivoted to the lugs or headgof the adjustable disk 0, pivoted to the head f of the reciprocating shaft e, and provided with the arm 8, and adjusting-screw it, said devices being mounted on a standard and combined with a saw-holding device, also mounted on said standard, substantially as described.

2. The face-plate w, with steady-rest c and center stud, 3 combined with bracket 1; and standard 'd, said bracket being laterally adjustable. on said standard, and said standard having a reciprocating file-carrier mounted upon it, substantially as described.-

3. The combination of the adjustable conical center stud, y, clamp a, screw z, and nuts I) with the slotted face-plate w and steady-rest c, substantially as described.

FREDERICK MYERS.

Witnesses:

J OHN DEAN, T. J .OsMAN, Both of 17 Gracechurch Street, London, E. O. 

